/o/ as always posttonic?

Suppose one adopts the crazy idea that /o/ after all *is*
phonetically conditioned.

Then acrostatic nouns with e/o root alternation are a problem

Which can be solved only if we assume that the o-grade form once had
a pretonic syllable.


E.g.
*we/oder "water" vs. *akW- "water" (and then some lenition rules)
*pe/od- "foot" vs. apo "under"
*ne/okW-t- "night" ("dunkel, licht, Strahl" vs.
*onkW-t- (*ankWt-?) "early (morning)" and
*ang- (*angW-?) "coal" ("light, fire")


There are some that I missed. What are they?


Torsten